To allow a large-sized display to be externally connected without limitation on the frequency of display data.

The display system is provided with a host 300 that processes digital data and with a liquid crystal display(LCD) 400 that displays image data sent from the host. The host 300 is provided with a transmission means 310 that converts image data into display data 213 of a digital system including at least video data and synchronizing data, while the LCD device 400 is provided with a reception section 410 that receives the display data 213, with a video data conversion section 420 that converts the video data included in the display data received by the reception section into data of a prescribed display mode and with a display panel 250 the displays the video data in a prescribed display mode. Thus, the system does not require an A/D converter is required for analog input data.